chore: trim .gitignore — remove machine-specific and cross-repo entries

Per reviewer feedback (NicoleMGomes):
- Remove .ucl-provision/ and src/sap_cloud_sdk/adms/ucl/ — UCL
  provisioning artefacts belong to a separate repo, not the SDK.
- Remove scripts/adms_cli.py — local debug script that only exists on
  the author's machine; no scripts/ directory is tracked in this repo.

Kept:
- .DS_Store — standard macOS metadata guard
- .env.adms — any contributor following the ADMS integration test setup
  creates this file locally; the entry prevents accidental commits of
  IAS credentials.

Author: adwitiyasushant

.gitignore

@@ -43,10 +43,5 @@ RELEASE.md
 # macOS metadata
 .DS_Store
 
-# UCL provisioning artefacts (separate repo concern)
-.ucl-provision/
-src/sap_cloud_sdk/adms/ucl/
-
-# ADMS local dev files (credentials + debug CLI — never commit)
+# ADMS credentials — anyone setting up ADMS integration tests creates this file locally
 .env.adms
-scripts/adms_cli.py